CN218358383U

CN218358383U - Hot drying device for compressed gas

Info

Publication number: CN218358383U
Application number: CN202223300529.4U
Authority: CN
Inventors: 李大明
Original assignee: Xi'an Unionfilter Purification Equipment Co ltd
Current assignee: Xi'an Unionfilter Purification Equipment Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-01-24
Anticipated expiration: 2032-12-09

Abstract

The utility model relates to a hot drying device of compressed gas, including first drying tower and second drying tower and the piping of connection on first drying tower and second drying tower, be equipped with the piping control valve on the piping, piping control valve structure is used for controlling one of them adsorption drying compressed gas in first drying tower and the second drying tower, another heats regeneration, hot drying device of compressed gas still includes the blow-cooling pipeline, blow-cooling pipeline connection is at the both ends of first drying tower and second drying tower, be equipped with the fan on the blow-cooling pipeline, the fan is used for blowing cooling gas into the regenerated drying tower of heating in order to blow the cold, be equipped with the blow-cooling pipeline control valve structure that is used for controlling blow-cooling pipeline break-make on the blow-cooling pipeline; the cold blow line is arranged on the first drying tower and the second drying tower in parallel with the piping. The cooling and adsorption are operated independently, the condition that the load of the fan is constantly changed is avoided, and the service life of the fan is prolonged.

Description

Hot drying device for compressed gas

Technical Field

The present invention relates generally to the field of gas separation and drying. More particularly, the present invention relates to a compressed gas thermal drying apparatus.

Background

Compressed gas is a power energy widely used in industry, after the gas is compressed by a compressor, the pressure and the temperature of the gas are increased, and the compressed gas often contains impurities such as oil, water, dust and the like and needs to be purified. For different kinds of compressors, the discharge pressure, temperature and measurement discharge amount are different, and various purification treatment methods are adopted in industry, wherein the adsorption type compressed gas dryer is most widely applied. For high flow compressors (e.g., centrifugal compressors), the most used dryers currently use compression heat to regenerate adsorption dryers.

The structure of regeneration adsorption dryer is shown as the chinese utility model patent that the publication number of granting is CN215086031U more, and regeneration adsorption dryer includes first drying tower and second drying tower, and all store the adsorbent in two drying towers, and the adsorbent can carry out adsorption drying to compressed gas. The regeneration adsorption dryer further comprises an air inlet pipe, an air outlet pipe and a pipe system, the pipe system is connected with the air inlet pipe, the air outlet pipe, the first drying tower and the second drying tower, the regeneration adsorption dryer further comprises a pipe system control valve structure arranged on the pipe system, the pipe system control valve structure can control one of the drying towers to perform adsorption drying, and the other drying tower utilizes the waste heat of compressed gas and the heating of the heater to perform heating regeneration. The piping system comprises an upper piping system and a lower piping system, the upper piping system comprises a regenerated gas inlet pipe and a dry gas exhaust pipe which are connected in parallel, and the lower piping system comprises a regenerated gas exhaust pipe and a moisture inlet pipe which are connected in parallel. Parallelly arranged on the intake pipe has first air intake branch and second air intake branch, and first air intake branch links to each other with the regeneration gas intake pipe, and second air intake branch links to each other with the moisture intake pipe, links to each other through the connecting pipe between regeneration gas blast pipe and the moisture intake pipe. Wherein, first control valve and second control valve that connect in parallel are arranged on regeneration gas intake pipe, dry gas blast pipe, regeneration gas blast pipe, the moisture intake pipe respectively. The air outlet pipe is connected with the dry gas exhaust pipe through a fifth connecting pipe.

The regeneration adsorption dryer further comprises a sixth connecting pipe connected to the fifth connecting pipe, a second cooler, a fan and a third valve are arranged on the sixth connecting pipe, when the drying tower for heating regeneration needs to be cooled, the third valve is opened, the fan takes gas from the gas outlet pipe and cools the gas through the second cooler, then the cooled gas is introduced into the drying tower for heating regeneration to achieve cooling blowing, and the cooled gas enters the gas outlet pipe again.

The regeneration adsorption dryer is a hot drying device for compressed gas, the first drying tower is a drying tower A in the patent, the second drying tower is a drying tower B in the patent, the first control valves are a valve A1, a valve A2, a valve A3 and a valve A4 in the patent, the second control valves are a valve B1, a valve B2, a valve B3 and a valve B4 in the patent, the dry gas exhaust pipe is a pipeline where the valve A1 and the valve B1 are located, the wet gas inlet pipe is a pipeline where the valve A3 and the valve B3 are located, the regeneration gas inlet pipe is a pipeline where the valve A2 and the valve B2 are located, and the regeneration gas exhaust pipe is a pipeline where the valve A4 and the valve B4 are located. The first air inlet branch pipe is a first connecting pipe in the patent, the second air inlet branch pipe comprises a second connecting pipe and a third connecting pipe in the patent, and the connecting pipe is a fourth connecting pipe in the patent.

The hot drying device in the prior art has the problems that when the drying tower is cooled by blowing, the fan takes gas from the gas outlet pipe and blows the gas into the drying tower after cooling, the gas outlet pipe has pressure fluctuation during use, the load of the fan is continuously changed, the service life of the fan is shortened, and once the fan breaks down, the whole hot drying device for compressed gas cannot normally operate. Moreover, if the compressed air is not completely dried, the air in the air outlet pipe still has certain humidity, the moisture has certain corrosivity, the fan is corroded after being sucked by the fan, and the service life of the fan is also shortened.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a hot drying device of compressed gas to solve among the prior art fan and get gas from outlet duct department and blow cold to the drying tower and lead to the shorter technical problem of fan life.

In order to achieve the above object, the utility model provides a compressed gas's hot drying device adopts following technical scheme: a thermal drying apparatus for compressed gas, comprising:

a first drying tower and a second drying tower;

the system comprises a piping system connected to the first drying tower and the second drying tower and a piping system control valve structure arranged on the piping system, wherein the piping system control valve structure is used for controlling one of the first drying tower and the second drying tower to adsorb and dry compressed gas and the other one of the first drying tower and the second drying tower to perform heating regeneration;

the device for thermal drying of compressed gas further comprises:

the blowing pipeline is connected to the two ends of the first drying tower and the second drying tower, a fan is arranged on the blowing pipeline and used for blowing cooling gas into the heating and regenerating drying tower for blowing, and a blowing pipeline control valve structure used for controlling the on-off of the blowing pipeline is arranged on the blowing pipeline;

the cold blow line is arranged on the first drying tower and the second drying tower in parallel with the piping.

Has the beneficial effects that: the blowing pipeline is independent of the piping arrangement, relies on the fan operation to blow in cooling gas and realizes the blowing in the regenerated drying tower of heating, through blowing pipeline control valve structure disconnection blowing pipeline when not needing the blowing, avoids causing the influence to the fan. The air inlet of the fan is not connected with the pipe system, the air outlet pipe can be connected with the pipe system, the air inlet of the fan cannot be connected with the air outlet pipe of the drying device, the air inlet of the fan is not influenced by pressure fluctuation of the air outlet pipe, the air cooling and the adsorption are independently operated, the condition that the load of the fan is constantly changed is avoided, and the service life of the fan is prolonged. In the blowing and cooling process, compressed gas does not enter the heating and regenerating drying tower any more, and the structure in the drying tower can be maintained on line. Even if the humidity of the gas in the gas outlet pipe is high and the gas has corrosiveness, the influence on the fan of the blowing cooling pipeline can not be caused, and the service life of the fan can be prolonged.

As a further improvement, the cooling blowing pipeline and the heating and regenerating drying tower form a closed circulation system, and a cooler is arranged on the cooling blowing pipeline and used for cooling gas exhausted from the heating and regenerating drying tower. The closed circulation system further ensures the stability of the pressure of the cold blowing pipeline.

As a further improvement, the cold blowing pipeline comprises a cooling gas inlet pipe, a cooling gas pipe and a cooling gas exhaust pipe which are sequentially connected, wherein two ends of the cooling gas inlet pipe are connected to one end port of the first drying tower and one end port of the second drying tower, two ends of the cooling gas exhaust pipe are connected to the other end ports of the first drying tower and the second drying tower, and the fan and the cooler are arranged on the cooling gas pipe;

blow cold pipeline control valve structure is including locating first cooling gas admission valve and the second cooling gas admission valve in the cooling gas intake pipe, blow cold pipeline control valve structure still including locating first cooling gas exhaust valve and the second cooling gas exhaust valve on the cooling gas exhaust pipe, first cooling gas admission valve, first cooling gas exhaust valve with first drying tower corresponds, second cooling gas admission valve, second cooling gas exhaust valve with the second drying tower corresponds, the tracheal one end of cooling is connected in the cooling gas intake pipe and is located between first cooling gas admission valve and the second cooling gas admission valve, the tracheal other end of cooling is connected on the cooling gas exhaust pipe and is located between first cooling gas exhaust valve and the second cooling gas exhaust valve. Through the opening and closing of the first cooling air inlet valve, the second cooling air inlet valve, the first cooling air exhaust valve and the second cooling air exhaust valve on the blowing cooling pipeline, the same fan can be used for blowing cooling during the adsorption of the first drying tower, the regeneration of the second drying tower, the regeneration of the first drying tower and the adsorption of the second drying tower, and the cost is lower.

As a further improvement, the pipe system comprises a wet gas inlet pipe and a dry gas outlet pipe, the two ends of the wet gas inlet pipe and the two ends of the dry gas outlet pipe are connected to the first drying tower and the second drying tower, and the fan is used for blowing cooling gas to one end, provided with the wet gas inlet pipe, of the first drying tower and the second drying tower. When blowing cold, cooling gas gets into drying tower after the temperature risees gradually, and the residual water content of formation also diminishes gradually, can form residual water content gradient distribution in the drying tower, and when the follow-up adsorption drying that carries on, the moisture is got into by the higher one end of residual water content, is discharged by the lower one end of residual water content, carries moisture again when avoiding the gas after the drying to discharge by the higher one end of residual water content, is favorable to guaranteeing finished product gas index.

The system comprises a wet gas inlet pipe, a dry gas exhaust pipe, a regenerated gas inlet pipe and a regenerated gas exhaust pipe, and also comprises a connecting pipe for connecting the regenerated gas exhaust pipe and the wet gas inlet pipe, wherein the two ends of the wet gas inlet pipe, the two ends of the dry gas exhaust pipe, the two ends of the regenerated gas inlet pipe and the two ends of the regenerated gas exhaust pipe are connected to the first drying tower and the second drying tower;

the hot drying device of compressed gas includes intake pipe and parallelly connected first air inlet branch pipe, the second air inlet branch pipe of arranging in the intake pipe, and first air inlet branch pipe links to each other with the regeneration gas intake pipe, and the second air inlet branch pipe links to each other with the moisture intake pipe, be equipped with the heater on the first air inlet branch pipe, be equipped with the governing valve on the second air inlet branch pipe, the governing valve is used for controlling the break-make and the air input of second air inlet branch pipe. Can change the air input of second air inlet branch, first air inlet branch through the governing valve, can realize pure waste heat heating in earlier stage, later stage waste heat and heater heat jointly, avoid the flow through the heater too big and lead to heater power too big, practice thrift the cost.

As a further improvement, a cooler and a gas-liquid separator are arranged on the second air inlet branch pipe.

As a further improvement, the hot drying device for the compressed gas comprises an air outlet pipe connected to a dry gas exhaust pipe, and a post-filter is arranged on the air outlet pipe. The post-filter can remove the adsorbent powder generated in the adsorption process.

As a further improvement, the piping system further comprises an air outlet pipe, the piping system control valve structure comprises a first control valve and a second control valve which are arranged on the wet gas inlet pipe, the dry gas outlet pipe, the regenerated gas inlet pipe and the regenerated gas outlet pipe, the first control valve corresponds to the first drying tower, and the second control valve corresponds to the second drying tower;

the one end of first inlet branch pipe is connected in the regeneration gas intake pipe and is located the first control valve of regeneration gas intake pipe, between the second control valve, the one end of second inlet branch pipe is connected in the moisture intake pipe and is located the first control valve of moisture intake pipe, between the second control valve, the one end of outlet duct is connected on the dry gas blast pipe and is located the first control valve of dry gas blast pipe, between the second control valve, the one end of connecting pipe is connected on the regeneration gas blast pipe and is located the first control valve of regeneration gas blast pipe, between the second control valve.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 is a schematic view of an embodiment 1 of the apparatus for thermal drying of compressed gas provided by the present invention;

FIG. 2 is a schematic view of an embodiment 5 of the apparatus for thermal drying of compressed gas provided by the present invention;

fig. 3 is a schematic view of an embodiment 7 of the apparatus for thermal drying of compressed gas according to the present invention.

Description of the reference numerals:

1. a first drying tower; 2. a second drying tower; 3. a dry gas exhaust pipe; 4. a regenerated gas inlet pipe; 5. a cooling gas exhaust pipe; 6. a first dry gas exhaust valve; 7. a second dry gas exhaust valve; 8. a first regeneration gas inlet valve; 9. a second regeneration gas inlet valve; 10. a first cooling gas exhaust valve; 11. a second cooling gas exhaust valve; 12. a moisture inlet pipe; 13. a regeneration gas exhaust pipe; 14. a cooling gas inlet pipe; 15. a first moisture inlet valve; 16. a second moisture inlet valve; 17. a first regeneration gas vent valve; 18. a second regeneration gas exhaust valve; 19. a first cooling gas inlet valve; 20. a second cooling gas inlet valve; 21. an air outlet pipe; 22. a connecting pipe; 23. cooling the air pipe; 24. an air inlet pipe; 25. a first intake branch pipe; 26. a second intake branch pipe; 27. a heater; 28. a first cooler; 29. a gas-liquid separator; 30. adjusting a valve; 31. a post-filter; 32. a second cooler; 33. a circulating fan; 34. a first cool air blowing pipe; 35. a second cold air blowing pipe; 36. a first heater; 37. a second heater; 38. a first connecting pipe; 39. a second connecting pipe; 40. a first connection pipe control valve; 41. and a second connecting pipe control valve.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are some, not all embodiments of the invention. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.

The principles and spirit of the present invention are explained in detail below with reference to a number of representative embodiments of the invention.

The utility model provides a compressed gas's hot drying device's embodiment 1:

as shown in fig. 1, the thermal drying apparatus for compressed gas includes two drying towers, which are defined as a first drying tower 1 and a second drying tower 2, and both drying towers have an adsorbent therein, which can absorb moisture, and at the same time, the saturated adsorbent can be regenerated after being heated at a high temperature. When the device is used, one drying tower is used for adsorbing moisture in compressed gas, and the other drying tower is used for heating and regenerating.

The hot drying apparatus for compressed gas further includes an upper piping installed at upper ports of the first drying tower 1 and the second drying tower 2 and a lower piping installed at lower ports of the first drying tower 1 and the second drying tower 2.

The upper pipe system comprises a dry gas exhaust pipe 3, a regenerated gas intake pipe 4 and a cooling gas exhaust pipe 5 which are connected in parallel, a first dry gas exhaust valve 6 and a second dry gas exhaust valve 7 are arranged on the dry gas exhaust pipe 3, a first regenerated gas intake valve 8 and a second regenerated gas intake valve 9 are arranged on the regenerated gas intake pipe 4, and a first cooling gas exhaust valve 10 and a second cooling gas exhaust valve 11 are arranged on the cooling gas exhaust pipe 5.

The lower pipe system includes a moisture inlet pipe 12, a regeneration gas outlet pipe 13, and a cooling gas inlet pipe 14 connected in parallel with each other, a first moisture inlet valve 15 and a second moisture inlet valve 16 are disposed on the moisture inlet pipe 12, a first regeneration gas outlet valve 17 and a second regeneration gas outlet valve 18 are disposed on the regeneration gas outlet pipe 13, and a first cooling gas inlet valve 19 and a second cooling gas inlet valve 20 are disposed on the cooling gas inlet pipe 14.

The first dry gas exhaust valve 6, the first regeneration gas inlet valve 8, the first cooling gas exhaust valve 10, the first moisture gas inlet valve 15, the first regeneration gas exhaust valve 17 and the first cooling gas inlet valve 19 correspond to the first drying tower 1, and the second dry gas exhaust valve 7, the second regeneration gas inlet valve 9, the second cooling gas exhaust valve 11, the second moisture gas inlet valve 16, the second regeneration gas exhaust valve 18 and the second cooling gas inlet valve 20 correspond to the second drying tower 2.

The apparatus for drying compressed gas also includes an inlet pipe 24, an outlet pipe 21, a connecting pipe 22, and a cooling air pipe 23.

A first intake branch pipe 25 and a second intake branch pipe 26 are arranged in parallel on the intake pipe 24. One end of the first intake branch pipe 25 is connected to the regeneration gas intake pipe 4 and is located between the first regeneration gas intake valve 8 and the second regeneration gas intake valve 9, so that the first regeneration gas intake valve 8 and the second regeneration gas intake valve 9 are arranged in parallel. One end of the second intake branch pipe 26 is connected to the moisture intake pipe 12 and is located between the first moisture intake valve 15 and the second moisture intake valve 16, so that the first moisture intake valve 15 and the second moisture intake valve 16 are arranged in parallel. The first air inlet branch pipe 25 is provided with a heater 27, wherein the heater 27 is preferably an electric heater, and in practical use, the electric heater can also be heated by heat conduction oil, namely, gas exchanges heat with hot oil. A first cooler 28 and a gas-liquid separator 29 are disposed in the second intake branch pipe 26, the first cooler 28 being capable of cooling the gas flowing therethrough, and the gas-liquid separator 29 being capable of gas-liquid separation. A regulating valve 30 is also arranged in the second branch inlet pipe 26, and the regulating valve 30 can control whether the gas enters the first cooler 28 or not and the amount of the intake air.

One end of the air outlet pipe 21 is connected to the dry gas exhaust pipe 3 and is located between the first dry gas exhaust valve 6 and the second dry gas exhaust valve 7, so that the first dry gas exhaust valve 6 and the second dry gas exhaust valve 7 are arranged in parallel. The outlet pipe 21 is provided with a post-filter 31 capable of removing adsorbent powder generated during adsorption.

The connection pipe 22 has one end connected to the second intake branch pipe 26 and is located between the first cooler 28 and the regulation valve 30, and the other end connected to the regeneration gas exhaust pipe 13 and is located between the first regeneration gas exhaust valve 17 and the second regeneration gas exhaust valve 18 such that the first regeneration gas exhaust valve 17 and the second regeneration gas exhaust valve 18 are arranged in parallel.

One end of the cooling gas pipe 23 is connected to the cooling gas exhaust pipe 5 and is located between the first cooling gas exhaust valve 10 and the second cooling gas exhaust valve 11, so that the first cooling gas exhaust valve 10 and the second cooling gas exhaust valve 11 are arranged in parallel; the other end of the cooling air pipe 23 is connected to the cooling air inlet pipe 14 and is located between the first cooling air inlet valve 19 and the second cooling air inlet valve 20, so that the first cooling air inlet valve 19 and the second cooling air inlet valve 20 are arranged in parallel. A second cooler 32 and a circulation fan 33 are disposed on the cooling air pipe 23, the second cooler 32 can cool the gas flowing therethrough, and the circulation fan 33 can blow the cooled gas toward the cooling air intake pipe 14.

Utilize the utility model discloses a compressed gas drying device carries out the step that first drying tower 1 adsorbs, second drying tower 2 heats regeneration as follows:

1. the first drying tower 1 absorbs and the second drying tower 2 regenerates the waste heat

The second regeneration air inlet valve 9, the second regeneration air exhaust valve 18, the first wet gas inlet valve 15 and the first dry gas exhaust valve 6 are opened, and the rest valves are closed. The secondary low-temperature gas compressed by the compressor enters the second drying tower 2 through the heater 27 (the heater 27 is not opened), the second regenerated gas air inlet valve 9, the second drying tower 2 is preheated by using heat carried by the gas, the heated gas enters the first cooler 28 through the second regenerated gas exhaust valve 18 and the gas-liquid separator 29 and is cooled to separate liquid water, then the gas enters the first drying tower 1 through the first moisture air inlet valve 15 to adsorb water vapor, the adsorbed dry gas is sent to the post-filter 31 through the first dry gas exhaust valve 6, and the post-filter 31 removes adsorbent powder generated in the adsorption process and then sends out dry and clean gas.

2. The first drying tower 1 absorbs and the second drying tower 2 is heated and regenerated

The states of the valves are kept unchanged, after the second drying tower 2 is preheated by pure waste heat for a period of time, the temperature of the tower body and the water content of the absorbent in the tower reach a balanced state, at the moment, the heater 27 is opened to heat the secondary low-temperature gas from the compressor, and the second drying tower 2 is heated at a higher temperature by the same process.

3. The first drying tower 1 absorbs, the second drying tower 2 electricelectric heats

The state of each valve is kept unchanged, a lower dew point is required to be realized, a higher temperature is required for regeneration, but the heater 27 may have huge power due to direct heating of the main gas flow, at the moment, the opening degree of the regulating valve 30 is changed, most of gas (70% -80%) directly enters the first cooler 28 and the gas-liquid separator 29 through the regulating valve 30, the other part of gas is heated to a desired temperature (180-220 ℃) through the heater 27 and enters the second drying tower 2 through the second regeneration gas inlet valve 9 to perform enhanced regeneration on the adsorbent in the second drying tower 2, and the regeneration gas returns to the upstream of the first cooler 28 through the second regeneration gas outlet valve 18 and is merged with the gas flow passing through the regulating valve 30 to enter the first drying tower 1 for adsorption.

4. The first drying tower 1 absorbs and the second drying tower 2 blows cold

After the pure electric heating of the second drying tower 2 is finished, the heater 27 stops working, the second regeneration gas air inlet valve 9 and the second regeneration gas exhaust valve 18 are closed, the regulating valve 30 is fully opened, and the main air flow directly enters the first cooler 28 and the gas-liquid separator 29 to separate liquid water and then enters the first drying tower 1 through the first moisture air inlet valve 15 for adsorption. At this time, the second cooling air inlet valve 20 and the second cooling air exhaust valve 11 are opened, the circulating fan 33 is started, the circulating fan 33 serves as a power source to form a closed circulating system of the circulating fan 33, the second cooling air inlet valve 20, the second drying tower 2, the second cooling air exhaust valve 11 and the circulating fan 33, the circulating fan 33 blows air cooled by the second cooler 32 into the second drying tower 2 through the second cooling air inlet valve 20 to cool the second drying tower 2, hot air returns to the second cooler 32 through the second cooling air exhaust valve 11, and the cooling of the second drying tower 2 is achieved through sequential circulation.

When the first drying tower 1 regenerates and the second drying tower 2 adsorbs, corresponding valves are correspondingly opened, for example, when the first drying tower 1 is filled with regeneration gas, the first regeneration gas inlet valve 8, the first regeneration gas exhaust valve 17, the second moisture inlet valve 16 and the second dry gas exhaust valve 7 need to be opened, and when the first drying tower 1 is cooled by blowing, the first cooling gas inlet valve 19 and the first cooling gas exhaust valve 10 need to be opened.

The utility model discloses in, the regenerated back of drying tower has formed closed circulation system when carrying out the forced draught cooling, mutual independence between this closed circulation system and the outlet duct 21, and circulating fan 33 does not receive the influence of pressure fluctuation in the outlet duct 21, avoids appearing shortening the condition emergence in circulating fan 33 life-span because of the load is undulant. Even if the gas in the outlet pipe 21 has high humidity and is corrosive, the circulating fan 33 is not affected. Moreover, the utility model discloses a closed circulation system gas flow is shorter, and loss of pressure is less, and circulating fan 33 air inlet end and the pressure differential of air-out end are less, and circulating fan 33 does not need overload work, and life is longer.

In the present embodiment, the first dry gas exhaust valve 6, the first regeneration gas intake valve 8, the first wet gas intake valve 15, and the first regeneration gas exhaust valve 17 are all first control valves, and the second dry gas exhaust valve 7, the second regeneration gas intake valve 9, the second wet gas intake valve 16, and the second regeneration gas exhaust valve 18 are all second control valves, and the first control valves and the second control valves together constitute a piping control valve structure.

The cooling gas exhaust pipe 5, the cooling gas intake pipe 14, and the cooling gas pipe 23 together form a cooling blow line, the second cooler 32 constitutes a cooler on the cooling blow line, and the circulation fan 33 constitutes a fan that blows the cooling gas into the drying tower for heating regeneration. The first cooling gas exhaust valve 10, the second cooling gas exhaust valve 11, the first cooling gas inlet valve 19, and the second cooling gas inlet valve 20 together form a cooling blowing line control valve structure. The upper and lower piping together constitute piping.

The utility model provides a compressed gas's hot drying device's embodiment 2:

the difference from example 1 is mainly that: in embodiment 1, the heater is provided on the first intake manifold, the regulating valve is provided on the second intake manifold, and the flow rates of the first intake manifold and the second intake manifold are regulated by changing the opening degree of the regulating valve. In this embodiment, the regulating valve is replaced with an on-off valve, and the on-off valve only switches on or off the second air inlet branch pipe without regulating the flow rate.

The utility model provides a compressed gas's hot drying device's embodiment 3:

the difference from example 1 is mainly that: in example 1, the fan blows the cooling gas to the end of the first drying tower and the second drying tower where the moisture inlet pipe is provided. In this embodiment, the fan may blow the cooling gas toward the other ends of the first drying tower and the second drying tower.

The utility model provides a compressed gas's hot drying device's embodiment 4:

the difference from example 1 is mainly that: in embodiment 1, the cold blowing pipeline includes a cooling gas inlet pipe, a cooling gas exhaust pipe and a cooling gas pipe, the cooling gas inlet pipe and the cooling gas exhaust pipe are both provided with two control valves connected in parallel, and the two drying towers share one cooling gas pipe. In this embodiment, the blow-cooling pipeline includes two independent first pipelines and second pipelines, and the both ends of first pipeline are connected at the both ends of first drying tower, and the both ends of second pipeline are connected at the both ends of second drying tower, and fan and cooler have been arranged to the equipartition on first pipeline and the second pipeline.

The utility model provides a compressed gas's hot drying device's embodiment 5:

the difference from example 1 is mainly that: in example 1, the cooling blow line and the drying tower that was heated and regenerated together formed a closed cycle system. In the present embodiment, as shown in fig. 2, both ends of the cooling blowing line are opened, the cooling blowing line includes a first cooling blowing pipe 34 and a second cooling blowing pipe 35 which are divided, the first cooling blowing pipe 34 is connected to the cooling gas exhaust pipe 5, the second cooling blowing pipe 35 is connected to the cooling gas intake pipe 14, and the circulation fan 33 is installed on the second cooling blowing pipe 35. The circulating fan 33 sucks cold air in the atmospheric environment and blows the cold air to the drying tower, and the air passing through the drying tower is discharged to the atmosphere again, so that the load fluctuation of the fan is smaller compared with a mode of taking air from an air outlet pipe in the prior art although a closed circulating system is not formed, and the service life can be prolonged.

The utility model provides a compressed gas's hot drying device's embodiment 6:

the difference from example 1 is mainly that: in example 1, the dry gas exhaust pipe and the regeneration gas intake pipe are located at one ends of the first drying tower and the second drying tower, and the regeneration gas exhaust pipe and the moisture gas intake pipe are located at the other ends of the first drying tower and the second drying tower. In this embodiment, the dry gas exhaust pipe and the regeneration gas exhaust pipe are located at one ends of the first drying tower and the second drying tower, and the wet gas intake pipe and the regeneration gas intake pipe are located at the other ends of the first drying tower and the second drying tower.

The utility model provides a compressed gas's hot drying device's embodiment 7:

the difference from example 1 is mainly that: in embodiment 1, the piping system comprises a wet gas inlet pipe, a dry gas outlet pipe, a regeneration gas inlet pipe, a regeneration gas outlet pipe, and a connecting pipe, and the piping system control valve structure comprises a first dry gas exhaust valve, a first regeneration gas inlet valve, a first wet gas inlet valve, a first regeneration gas exhaust valve, a second dry gas exhaust valve, a second regeneration gas inlet valve, a second wet gas inlet valve, and a second regeneration gas exhaust valve. In the present embodiment, as shown in fig. 3, the piping system includes a wet gas intake pipe 12, a dry gas exhaust pipe 3, a first wet gas intake valve 15 and a second wet gas intake valve 16 arranged on the wet gas intake pipe 12, a first dry gas exhaust valve 6 and a second dry gas exhaust valve 7 arranged on the dry gas exhaust pipe 3, an intake pipe 24 connected to the wet gas intake pipe 12 and having an end located between the first wet gas intake valve 15 and the second wet gas intake valve 16, and an outlet pipe 21 connected to the dry gas exhaust pipe 3 and having an end located between the first dry gas exhaust valve 6 and the second dry gas exhaust valve 7. The moisture inlet pipe 12 is provided with a first heater 36 and a second heater 37, and the first heater 36 and the second heater 37 are arranged in parallel. A first connecting pipe 38 and a second connecting pipe 39 are further connected between the first drying tower 1 and the second drying tower 2, the first connecting pipe 38 is used for introducing the regeneration gas discharged from the second drying tower 2 into the first drying tower 1, and the second connecting pipe 39 is used for introducing the regeneration gas discharged from the first drying tower 1 into the second drying tower 2. A first connection pipe control valve 40 is disposed on the first connection pipe 38, and a second connection pipe control valve 41 is disposed on the second connection pipe 39. The structure of the cooling blow line was the same as that of example 1 and will not be described in detail. Note that, in the drawings, neither the cooler nor the gas-liquid separator is shown. In the present embodiment, both the first moisture inlet valve 15 and the second moisture inlet valve 16 are adjustable valves, and the ventilation amount can be adjusted.

When the device is used, for example, the first drying tower 1 is used for adsorption drying, and the second drying tower 2 is used for heating regeneration, when the second drying tower 2 is used for pure waste heat regeneration, the second moisture inlet valve 16, the first connecting pipe control valve 40 and the first dry gas exhaust valve 6 are opened, and other valves are closed. The secondary low-temperature gas compressed by the compressor enters the first drying tower 1 through the second heater 37 (the second heater 37 is not started), the second moisture gas inlet valve 16, the second drying tower 2 and the first connecting pipe 38, and is discharged through the first dry gas exhaust valve 6 and the gas outlet pipe 21. The valve is not changed during the mixed heat regeneration, and the second heater 37 is turned on. When pure electric heating is carried out, the first moisture inlet valve 15 and the second moisture inlet valve 16 are adjusted, and the first heater 36 is not started; one part of the gas enters the second drying tower 2 and then enters the first drying tower 1, and the other part of the gas directly enters the first drying tower 1. When the second drying tower 2 blows cold, the valves except for the cold blowing pipeline are closed, the second cooling air exhaust valve 11 and the second cooling air inlet valve 20 are opened, and the circulating fan 33 and the second cooler 32 are started to blow cold.

And correspondingly opening related valves when the first drying tower 1 is heated and regenerated and the second drying tower 2 is used for adsorption and drying.

While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention. The following claims are intended to define the scope of the invention and to cover module components, equivalents, or alternatives falling within the scope of these claims.

Claims

1. A thermal drying apparatus for compressed gas, comprising:

a first drying tower (1) and a second drying tower (2);

the system comprises a piping system connected to the first drying tower (1) and the second drying tower (2) and a piping system control valve structure arranged on the piping system, wherein the piping system control valve structure is used for controlling one of the first drying tower (1) and the second drying tower (2) to adsorb and dry compressed gas and the other one to carry out heating regeneration;

it is characterized in that the thermal drying device for compressed gas further comprises:

the cold blowing pipeline is connected to two ends of the first drying tower (1) and the second drying tower (2), a fan is arranged on the cold blowing pipeline, the fan is used for blowing cooling gas into the heating and regenerating drying tower to perform cold blowing, and a cold blowing pipeline control valve structure used for controlling the on-off of the cold blowing pipeline is arranged on the cold blowing pipeline;

the cold blowing pipeline and the piping system are arranged on the first drying tower (1) and the second drying tower (2) in parallel.

2. The compressed gas drying apparatus according to claim 1, wherein the cooling blowing line and the heating regeneration drying tower form a closed circulation system, and a cooler is provided on the cooling blowing line, and the cooler is used for cooling the gas discharged from the heating regeneration drying tower.

3. The hot drying device for compressed gas according to claim 2, wherein the cold blowing pipeline comprises a cooling gas inlet pipe (14), a cooling gas pipe (23) and a cooling gas exhaust pipe (5) which are connected in sequence, two ends of the cooling gas inlet pipe (14) are connected to one end ports of the first drying tower (1) and the second drying tower (2), two ends of the cooling gas exhaust pipe (5) are connected to the other end ports of the first drying tower (1) and the second drying tower (2), and the fan and the cooler are arranged on the cooling gas pipe (23);

blow cold pipeline control valve structure including locating first cooling gas admission valve (19) and second cooling gas admission valve (20) on cooling gas intake pipe (14), blow cold pipeline control valve structure still including locating first cooling gas exhaust valve (10) and second cooling gas exhaust valve (11) on cooling gas exhaust pipe (5), first cooling gas admission valve (19), first cooling gas exhaust valve (10) with first drying tower (1) corresponds, second cooling gas admission valve (20), second cooling gas exhaust valve (11) with second drying tower (2) correspond, the one end of cooling trachea (23) is connected on cooling gas intake pipe (14) and is located between first cooling gas admission valve (19) and second cooling gas admission valve (20), the other end of cooling trachea (23) is connected on cooling gas exhaust pipe (5) and is located between first cooling gas exhaust valve (10) and second cooling gas exhaust valve (11).

4. The compressed gas thermal drying apparatus according to claim 1, 2 or 3, wherein the piping system comprises a moisture inlet pipe (12) and a dry gas outlet pipe (3), both ends of the moisture inlet pipe (12) and the dry gas outlet pipe (3) are connected to the first drying tower (1) and the second drying tower (2), and the blower is used for blowing the cooling gas to one end of the first drying tower (1) and the second drying tower (2) where the moisture inlet pipe (12) is arranged.

5. The hot drying device for compressed gas according to claim 1, 2 or 3, wherein the piping system comprises a moisture inlet pipe (12), a dry gas outlet pipe (3), a regeneration gas inlet pipe (4), a regeneration gas outlet pipe (13), and further comprises a connecting pipe (22) for connecting the regeneration gas outlet pipe (13) and the moisture inlet pipe (12), wherein the two ends of the moisture inlet pipe (12), the dry gas outlet pipe (3), the regeneration gas inlet pipe (4) and the regeneration gas outlet pipe (13) are connected to the first drying tower (1) and the second drying tower (2);

compressed gas's hot drying device includes intake pipe (24) and parallelly connected first air inlet branch pipe (25), second air inlet branch pipe (26) of arranging on intake pipe (24), and first air inlet branch pipe (25) link to each other with regeneration gas intake pipe (4), and second air inlet branch pipe (26) link to each other with moisture intake pipe (12), be equipped with heater (27) on first air inlet branch pipe (25), be equipped with governing valve (30) on second air inlet branch pipe (26), governing valve (30) are used for controlling break-make and the air input of second air inlet branch pipe (26).

6. Device for the thermal drying of compressed gases according to claim 5, characterised in that said second branch intake duct (26) is provided with a cooler and a gas-liquid separator (29).

7. A hot drying device for compressed gas according to claim 5, characterized in that the hot drying device for compressed gas comprises an outlet pipe (21) connected to the dry gas outlet pipe (3), the outlet pipe (21) being provided with a post-filter (31).

8. The thermal drying device of compressed gas according to claim 5, wherein the piping system further comprises an outlet pipe (21), the piping system control valve structure comprises a first control valve and a second control valve which are arranged on the wet gas inlet pipe (12), the dry gas outlet pipe (3), the regeneration gas inlet pipe (4) and the regeneration gas outlet pipe (13), the first control valve corresponds to the first drying tower (1), and the second control valve corresponds to the second drying tower (2);

one end of the first air inlet branch pipe (25) is connected to the regenerated gas inlet pipe (4) and is located a first control valve of the regenerated gas inlet pipe (4), between second control valves, one end of the second air inlet branch pipe (26) is connected to the wet gas inlet pipe (12) and is located a first control valve of the wet gas inlet pipe (12), between second control valves, one end of the air outlet pipe (21) is connected to the dry gas exhaust pipe (3) and is located a first control valve of the dry gas exhaust pipe (3), between second control valves, one end of the connecting pipe (22) is connected to the regenerated gas exhaust pipe (13) and is located a first control valve of the regenerated gas exhaust pipe (13), between second control valves.